package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
public class UserServiceImpl implements UserService {
	
	private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
	
	@Autowired
	private WeChatProperties weChatProperties;
	
	@Autowired
	private UserMapper userMapper;
	
	/**
	 * 登录
	 *
	 * @param userLoginDTO
	 */
	@Override
	public User login(UserLoginDTO userLoginDTO) {
		// 创建登录数据集合
		HashMap<String, String> map = new HashMap<>();
		map.put("appid", weChatProperties.getAppid());
		map.put("secret", weChatProperties.getSecret());
		map.put("js_code", userLoginDTO.getCode());
		map.put("grant_type", "authorization_code");
		String res = HttpClientUtil.doGet(WX_LOGIN, map);
		
		// 解析返回数据
		JSONObject jsonObject = JSON.parseObject(res);
		String openid = (String) jsonObject.get("openid");
		if (openid == null) {
			throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
		}
		
		// 获取登录信息
		User user = userMapper.getUserOpenid(openid);
		if (user == null) {
			user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
			userMapper.login(user);
		}
		return user;
	}
}
